[PATCHv5][Kasan] Allow to override Asan shadow offset from command line

[Yury Gribov]

Hi all,

On 10/17/2014 11:53 AM, Yury Gribov wrote:
> On 09/29/2014 09:21 PM, Yury Gribov wrote:
>>>> Kasan developers has asked for an option to override offset of Asan
>>>> shadow memory region. This should simplify experimenting with memory
>>>> layouts on 64-bit architectures.
>>
>> New patch which checks that -fasan-shadow-offset is only enabled for
>> -fsanitize=kernel-address. I (unfortunately) can't make this --param
>> because this can be a 64-bit value.
>
> New patchset that adds strtoull to libiberty (blind copy-paste of
> already existing strtoul.c) and uses it to parse -fasan-shadow-offset
> (to avoid problem with compiling for 64-bit target a 32-bit host).

A new version of patchset which does a proper implementation of 
strtoll/strtoull in libiberty (with tests, docs and stuff).

Bootstrapped and regtested on x64.

As mentioned previously, I'm not sure how to properly test strtoll 
implementation (strtoll is already part of Linux glibc so my 
implementation is not compiled in by default).  I've manually embedded 
strtoll.o/strtoull.o into libiberty.a and verified that regression tests 
passed.

-Y
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